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What is the Fuel Pump Relay Location in the Mercedes S-Class?

Model: Mercedes Classe S W221, MK 5 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
Part: Fuel pump

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Video tutorial

If the fuel pump in your Mercedes S-Class suddenly stops working, first check the status of the respective relay, whose location is shown in this video. As demonstrated, the relay is located in the box inside the cabin, specifically between the two rear seats.

It is labeled with the letter "S" and is the last one in the right column when looking at the box from the front. If faulty, make sure to use a replacement with equivalent specifications and always work with the vehicle turned off to avoid any damage.


Updated on 4 September 2026 by ScegliAuto


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